1. Opening clearance inspection method: Diesel generator piston ring opening clearance refers to the space between the two ends of the ring opening after the piston ring is installed in the cylinder, it is therefore also called end game. to prevent the piston ring from getting stuck in the cylinder by thermal expansion. When checking the piston ring opening gap, install the selected piston ring flat into the cylinder, use the piston head to push the piston ring to the unworn part of the cylinder, and then use a feeler gauge to measure aperture gap. If the deviation is greater than the specified value, another piston ring must be selected; if it is less than the specified value, a hand grinder or a fine flat file can be used to file the first end of the segment. When filing, you should pay attention to the smoothness of themouth of the ring. After filing, remove the burrs on the outer ring mouth to prevent the sharp edges of the ring mouth from tiring the cylinder wall.
2. Side gap inspection method: The side gap of the diesel generator piston ring refers to the space between the ring and the plane side of the ring groove. When measuring, place the piston rings in their respective grooves. They must be able to rotate flexibly without any stagnation. Use a feeler gauge to measure the gap on one side. When detecting the side clearance of the scale ring, it should be installed in the cylinder with the piston and measured, and its value should conform to the regulations. If the side gap is too large, it will affect the sealing effect of the air ring, and it needs to be readjusted if the side gap is too small or the ring is wider than the groove of the ring, except for the trapezoidal ring, it must be readjusted and ground. Rings of other shapes can be placed over the joint on No. 0 gauze on a platform or flat glass. When grinding, keep the ring close to the emery cloth and move it evenly. You can also use flat glass coated with abrasive sand and dripping oil for grinding.
3. Clearance inspection method: Diesel generator piston ring clearance refers to the space between the back of the piston ring and the bottom surface of the ring groove after the piston and piston ring are installed in the cylinder. For ease of measurement, the measurement value is generally based on the distance the piston ring falls into the ring groove under the shore. It is generally believed that this measurement value only needs to be greater than 0~0.35mm. If it is too small, the ring will get stuck in the cylinder. If the gameis too low, it can be solved by digging deeper piston ring grooves.
4. How to check the elasticity of the piston ring: To check the elasticity of the piston ring, place the piston on the elasticity tester, pull the operating handle and secure the handle when the piston ring is compressed to the specified opening space, then adjust the scale to balance the two ends. The corresponding scale of the scale is the elasticity value of the ring. Generally, this measurement is rarely performed. The repairman only needs to feel the elasticity with his hands, that is, whether the outer circle feels "hard" when pinched with his hands.
5. How to Check for Light Leaks: Light leaks refer to the degree to which light can penetrate between the ring and the cylinder wall when the piston ring is installed in the cylinder. When inspecting, place the segment of piston horizontally in the cylinder, cover the inner circle of the segment with a circular plate, place a light source under the cylinder, then check the light leakage space. It is necessary that there is light leakage space. within 30° at both ends of the piston ring opening space. If there is a light leak, there should be no more than two light leaks from the same piston ring, the total arc should not exceed 45°, and the light leak space should be less than 0.03mm. When the light leakage gap is less than 0.015mm, the arc can be relaxed appropriately, but it should not exceed 120°.
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There are colloids and impurities in the fuel when the fuel passes through it. injector, resulting in gelled material inside and outside the fuel injectorTherehas carbon deposits from incomplete combustion impurities at the bottom, making the fuel injector too dirty.
The function of the fuel injector is to accurately deliver fuel inside the engine for combustion. The car's fuel injector is a simple solenoid valve. When the solenoid is energized, suction is generated, the needle is sucked in, and the nozzle hole is opened. Fuel is sprayed at high speed through the annular space between the needle at the needle head and the nozzle hole. , forming a mist conducive to complete combustion.
When the fuel injector fails, it will cause increased carbon deposits in the engine, unstable idling speed, increased fuel consumption, poor acceleration, difficulty in starting, excessive emissions, etc. In severe cases, this will cause the blockageuction of the fuel injector, thereby damaging the engine.
Reasons for high fuel consumption:
1. Poor ignition: the spark plug gap is too large and the ignition coil energy is not enough;
2. Poor fuel injector atomization: The fuel pressure regulator is faulty and the fuel pressure is too high.
3. Excessive carbon deposits in the engine: part of the injected gasoline is absorbed by carbon deposits; /p>
4. Sensor failure: For example, the failure of the water temperature sensor will falsely make the engine believe that it is still cold and still send fuel injection signals, resulting in high fuel consumption; >
5. Oxygen sensor failure: This will cause fuel correction to fail and the computer will continue to send a signal for fuel injection, a flow meterFaulty air filter will result in incorrect air intake data.
When you encounter a clogged fuel injector, please pay attention to the following points;
First of all, do not use your foot to manipulate the throttle, especially when the If the fuel injector is clogged, this will cause the fuel injector to be completely damaged.
Second, the fault indicator lights up after a long period of poor combustion. The fault light will only be reported after a certain number of times. This means that the car was not burning well before. The oil or the oil circuit may be damaged. Fuel may burn.
Third, when the oil circuit is not clean and improved, cleaning the throttle valve will cause the air intake to increase, the mixer to become thinner, the vehicle to idle at slow motion and a jump of the vehicle. when the accelerator is applied.
Fourth, repairing a car does not mean that it will be cured. Repairs can make problems elsewhere. This is normal and requires elimination.
Fifth, if you encounter a situation of poor combustion, shaking and rushing after adding a car, clean the oil line first and do not rush to replace the parts .
It's easy to manage. When you encounter such an error code, after detection, it was determined that the injector is clogged. The traditional method is to then remove the injector and replace it. the cost of replacement in working hours. Let's talk about the reason. We need to first understand why it is clogged, in order to avoid clogging later after replacement. After all, the cost of replacement is very high. after replacement, it will cost a lot of money.
Clogging is divided into two types. One is external cloggingcaused by ash and carbon deposits outside the fuel injector in the combustion chamber, and the other is internal clogging caused by oil in the oil circuit. Both types of blockages can be cleaned and unblocked with PNF additives. But be sure to use effective additives. Don't wait until there is a problem with the car before thinking about replacing parts, it will cost more than losing it without fixing the problem.